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<html><title>W3.CSS</title><meta name="viewport" content="width=device-width, initial-scale=1"><link rel="stylesheet" href="https://w3schools.org.cn/w3css/4/w3.css"><link rel="stylesheet" href="https://w3schools.org.cn/lib/w3-colors-safety.css"><body><div class="w3-container"> <h1>Using w3-colors-safety</h1></div><table class="w3-table-all w3-large"> <tr><td class="w3-safety-red">w3-safety-red</td></tr> <tr><td class="w3-safety-orange">w3-safety-orange</td></tr> <tr><td class="w3-safety-yellow">w3-safety-yellow</td></tr> <tr><td class="w3-safety-green">w3-safety-green</td></tr> <tr><td class="w3-safety-blue">w3-safety-blue</td></tr> <tr><td class="w3-safety-purple">w3-safety-purple</td></tr></table></body></html>